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EICO 635 Tube Tester





Select or type a tube name to get specific settings for the Eico 635 Tube Tester.

Sort columns values by clicking their titles - A → Z or Z → A

ID Tube 1 2 3 4 Socket Short Test
2676 25X6# A 4 G 3 D -
2677 25X6# A 8 G 5 D -
2678 25Z4# A 8 G 5 D -
2679 25Z6# A 4 G 3 D -
2680 25Z6# A 8 G 5 D -
2681 26A6 A 7 G 1 L 2-6
2682 26BK6 A 2 G 1 L -
2683 26BK6# C 2 G 5 L -
2684 26BK6# C 2 G 6 L -
2685 26C6 A 2 G 1 L -
2686 26C6# C 2 G 5 L -
2687 26C6# C 2 G 6 L -
2688 26CG6 A 7 G 1 L 2-6
2689 26D6 A 2 G 1 L 2-6
2690 26Z5W# A 3 G 1 A -
2691 26Z5W# A 8 G 6 A -
2692 27GB5 A 3 G 2 O 2-6
2693 27KG6 A 9 G 1 O 2-3
2694 28D7 A 6 G 2 H 2-3
2695 28D7 A 6 G 7 H -
2696 28GB5 A 3 G 2 O 2-6
2697 28HA6 A 1 G 2 A 2-6
2698 28HD5 A 4 G 3 I 2-5
2699 28Z5# A 7 G 3 H -
2700 28Z5# A 7 G 6 H -
Important
Note A: Set all switches before inserting the tube in its socket.
Note B: First test for shorts before making quality test.
Note C: If "shorts-grid leakage" indicator glows when tube is inserted in its proper socket do not test for quality. Damage to the circuit of the tube tester may occur or you may damage the tube.
Note D: Tubes listed with a "#" next to it is read on diodes OK scale.

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Last modified: Jun 5, 2026 20:40
Cape Old Radio - Since Nov, 1996
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